Electrolytic condenser and holder therefor



Aug. 9, 1932. 1-. J. SCOFIELD ELECTROLYTIC CONDENSER AND HOLDER THEREFORFiled Jan. 14, 1950 r M of o flyaxw ATTORNEY the condenser.

Patented Aug. 9, 1932 UNITED. [STATES PATENT [OFFICE THEODORE J.SCOFIELD, OF JACKSON, MICHIGAN, ASSIGNOR TO THE SPABKS-WITHING- TON 00.,OF JACKSON, MICHIGAN, A CORPORATION OF OHIO ELECTROLYTIC CONDENSER ANDHOLDER THEREFOR Application filed January 14, 1930. Serial No. 420,649.

This invention relates to holders for electrolytic condensers andsimilar devices.

An object of the invention is to so construct a holder that thecondenser, or other container, will permit the ready insertion andremoval of the condenser or other device without manipulation of screws,clamps or other holding devices.

Another object of the invention is to construct a holder for electricaldevices, such as the condenser above referred to, so that the conductorsleading thereto maybe held in place with the device in position butwhich terminals to compress gaskets 20, 21, tightmay be handily insertedor removed when the device is not in the holder.

Other objects will appear in the appended description, reference beinghad to the drawin in which:

Fig. 1 is a sectional view of an electrolyte container.

Fig. 2 is a top view of the cover of the electrolyte container.

Fig. 3 shows the manner of stamping the supporting base to form a holderfor the electrolytic condenser.

Fig. 4: is an elevation of the holder shown in Fig. 3 with the springclips forced into position to receive the container.

' Fig. 5 is an edge view of the holder shown in Fig. 4:-

Electrolytic condensers are commonly employed in radio receiving sets,particularly in the power apparatus of such sets. Great difficulty hasbeen experienced with these condensers as heretofore made, due to theman ner in which the cover of the container is sealed. In most cases theelectrolyte has been able to leak out around the electrolyte terminalsand through unsealed portions at various places in the cover. In myimproved condenser this dificulty has been overcome.

In Fig. 1 reference character 1 indicates a container for theelectrolyte of the condenser, which, of course, also houses theelectrodes of These electrodes are not shown but they are a continuationof the electrode terminals 2 and 3.

The container 1 may be drawn from a sin- 1e piece of appropriate metalto form an in- W tegral bottom with the sides of the container tainer 1in the latter case may be formed of a sheet of metal rolled intocylindrical form and seamed together along the sides. The base may bestamped, as shown and forced into the bottom of the container, afterwhich it is either soldered or welded thereto to make it leak-proof.

The electrodes 2 and 3 will pass through the holes 12 and 13 in therubber material 15 molded and vulcanized to the cover 4:. The nuts 18and 19 may be threaded on these ly against the molded material toprevent leakage. Filler cap 22 may be threaded in the hole 14 in themolded material and a tight joint will be formed through the use ofgasket 23. If necessary, vent :holes may be formed in this cap in such away as to prevent spilling of the liquid.

The cover plate 1 after it is placed in position may be soldered orwelded at its edges to the cylindrical portion 1.

An electrolytic condenser constructed as described forms an excellentcontainer for the electrolyte and it is entirely leak-pro of and may beused in radio sets without danger of 1 elgctrolyte spilling or creepingto the outsi e.

To hold the electrolytic condenser in the radio set I preferably stamp ametallic baseso as to cut out portions and leave projections 24. Theseprojections are then bent downward as shown in Figs. 4 and 5 to form asocket, but the projections extend suliicient- 1y toward the center toexert spring pressure on the container 1 of the condenser when it isforced into position. There is suficient ree siliency in the projections24: to always insure that they will frictionally engage the containerand hold it firmly in position. The container may be removed from theholder at any time by applying suflicient pressure in a reversedirection.

The notches 25, of which there are four, are preferably formed deepenough to extend beyond the bent-over strips 24 in Fig. 4 to giveadditional resiliency to these strips and to facilitate the stampingoperation. The

hole 26 is made sufliciently large to accommodate the conductors thatextend from the terminals 2 and 3 of the condenser to the other parts ofthe radio set. I have shown these wires in cross section at 28, 29surrounded by the usual insulating material 30. Before the condenser isinserted in the holder the electrical conductor may be readily insertedthrough the large opening in the holder and then slipped through theslot 27 into the enlargement 26. This method is preferable to threadingthe conductors through the hole 26 after the condenser is in place.

The construction of the electrolytic condenser is not claimed herein asit is claimed in my copending application, Serial No. 513,261 filedFebruary 3, 1931.

Having described my invention, what I claim is:

A holder for electrolytic condensers containin an opening and a smallhole at one side 0? the opening, said opening and hole being connectedby a channel for insertion of conductors, a pair of ears extendingdownwardly around the opening and separated by said channel, andadditional ears extending downwardly around the opening and separatedfrom each other and from the first mentioned cars by rounded openings insaid holder said ears defining a socket slightly smaller than thecondenser to be clamped therein.

In testimony whereof, I have signed my name to this specification this9th day of January 1930.

THEODORE J. SCOFIELD.

